From: Ian Kelling <ian@iankelling.org>
Date: Mon, 28 Jul 2014 15:19:02 +0000 (-0700)
Subject: fix bug when using -T for a link to a dirctory
X-Git-Url: https://iankelling.org/git/?p=lnf;a=commitdiff_plain;h=056e6160cd38fa3bf1622ed4f4c0179f84b53c2f

fix bug when using -T for a link to a dirctory
---

diff --git a/lnf b/lnf
index 104c901..29f137d 100755
--- a/lnf
+++ b/lnf
@@ -3,45 +3,59 @@
 # This program is under GPL v. 3 or later, see <http://www.gnu.org/licenses/>
 
 lnf() {
-    local help="lnf [--help] [-T] LN_ARGUMENT...
-Create symlinks conveniently and forcefully.
+    local help="lnf - Create symlinks conveniently and forcefully.
+Usage:
+       lnf -T TARGET LINK_NAME     (1st form)
+       lnf TARGET                  (2nd form)
+       lnf TARGET... DIRECTORY     (3rd form)
 
-Remove existing file/links using trash-put or rm -rf if it is not available.
-Create directory if needed. Small change to ln argument semantics: for 2 arguments,
-the second argument is a directory unless -T is passed. This removes ambiguity of
-replacing a file but not a directory. No ln option arguments are supported."
+Remove existing file in the using trash-put or rm -rf if it is not available.
+Create directory if needed. Slightly more restrictive arguments than ln.
+
+In the 1st form, create a link to TARGET with the name LINK_NAME.  In the 2nd
+form, create a link to TARGET in the current directory.  In the 3rd form, create
+links to each TARGET in DIRECTORY."
     
     if [[ $1 == --help || $# -eq 0 ]]; then
         echo "$help"
         return 0
     fi
 
-    local nodir=false
+    local nodir
     if [[ $1 == -T ]]; then
-        nodir=true
+        nodir=-T
         shift
+        if (( $# != 2 )); then
+            echo "lnf error: expected 2 arguments with -T flag. Got $#"
+            return 1
+        fi
     fi
     
+    local reset_extglob=false
+    ! shopt extglob >/dev/null && reset_extglob=true
+    shopt -s extglob
+
     
     local remove x
-    if type -P dircolors >/dev/null; then
+    if type -P trash-put >/dev/null; then
         remove=trash-put
     else
         remove="rm -rf"
     fi
     
-    if $nodir && [[ $# -eq 2 ]]; then
+    if [[ $nodir ]]; then
         if [[ -e "$2" || -L "$2" ]]; then
             $remove "$2"
-        elif [[ ! -d "$2/.." ]]; then
-            mkdir -p "$2/.."
+        elif ! mkdir -p "$(dirname "$2")"; then
+            echo "lnf error: failed to make directory $(dirname "$2")"
+            return 1
         fi
-    elif [[ $# -ge 2 ]]; then
+    elif (( $# >= 2 )); then
         if [[ -d ${!#} ]]; then
             local oldcwd=$PWD
-            cd ${!#} # last arg
-            for x in "${@:1:$(($#-1))}"; do # all but last arg
-                # remove any trailing slashes
+            cd "${!#}" # last arg
+            for x in "${@:1:$(( $# - 1 ))}"; do # all but last arg
+                # remove any trailing slashes, uses extglob
                 x="${x%%+(/)}"
                 # remove any leading directory components
                 x="${x##*/}"
@@ -49,11 +63,16 @@ replacing a file but not a directory. No ln option arguments are supported."
             done
             cd "$oldcwd"
         else
-            mkdir -p "${!#}"
+            if ! mkdir -p "${!#}"; then
+                echo "lnf error: failed to make directory ${!#}"
+                return 1
+            fi
         fi
     elif  [[ $# -eq 1 ]]; then
         [[ -e "${1##*/}" || -L "${1##*/}" ]] && $remove "${1##*/}"
     fi
-    ln -s -- "$@"
+
+    $reset_extglob && shopt -u extglob 
+    ln -s $nodir -- "$@"
 }
 lnf "$@"
diff --git a/lnf-function b/lnf-function
index daae096..9dbcef5 100644
--- a/lnf-function
+++ b/lnf-function
@@ -3,23 +3,32 @@
 # This program is under GPL v. 3 or later, see <http://www.gnu.org/licenses/>
 
 lnf() {
-    local help="lnf [--help] [-T] LN_ARGUMENT...
-Create symlinks conveniently and forcefully.
+    local help="lnf - Create symlinks conveniently and forcefully.
+Usage:
+       lnf -T TARGET LINK_NAME     (1st form)
+       lnf TARGET                  (2nd form)
+       lnf TARGET... DIRECTORY     (3rd form)
 
-Remove existing file/links using trash-put or rm -rf if it is not available.
-Create directory if needed. Small change to ln argument semantics: for 2 arguments,
-the second argument is a directory unless -T is passed. This removes ambiguity of
-replacing a file but not a directory. No ln option arguments are supported."
+Remove existing file in the using trash-put or rm -rf if it is not available.
+Create directory if needed. Slightly more restrictive arguments than ln.
+
+In the 1st form, create a link to TARGET with the name LINK_NAME.  In the 2nd
+form, create a link to TARGET in the current directory.  In the 3rd form, create
+links to each TARGET in DIRECTORY."
     
     if [[ $1 == --help || $# -eq 0 ]]; then
         echo "$help"
         return 0
     fi
 
-    local nodir=false
+    local nodir
     if [[ $1 == -T ]]; then
-        nodir=true
+        nodir=-T
         shift
+        if (( $# != 2 )); then
+            echo "lnf error: expected 2 arguments with -T flag. Got $#"
+            return 1
+        fi
     fi
     
     local reset_extglob=false
@@ -34,13 +43,14 @@ replacing a file but not a directory. No ln option arguments are supported."
         remove="rm -rf"
     fi
     
-    if $nodir && [[ $# -eq 2 ]]; then
+    if [[ $nodir ]]; then
         if [[ -e "$2" || -L "$2" ]]; then
             $remove "$2"
-        elif [[ ! -d "$2/.." ]]; then
-            mkdir -p "$2/.."
+        elif ! mkdir -p "$(dirname "$2")"; then
+            echo "lnf error: failed to make directory $(dirname "$2")"
+            return 1
         fi
-    elif [[ $# -ge 2 ]]; then
+    elif (( $# >= 2 )); then
         if [[ -d ${!#} ]]; then
             local oldcwd=$PWD
             cd "${!#}" # last arg
@@ -53,12 +63,15 @@ replacing a file but not a directory. No ln option arguments are supported."
             done
             cd "$oldcwd"
         else
-            mkdir -p "${!#}"
+            if ! mkdir -p "${!#}"; then
+                echo "lnf error: failed to make directory ${!#}"
+                return 1
+            fi
         fi
     elif  [[ $# -eq 1 ]]; then
         [[ -e "${1##*/}" || -L "${1##*/}" ]] && $remove "${1##*/}"
     fi
 
     $reset_extglob && shopt -u extglob 
-    ln -s -- "$@"
+    ln -s $nodir -- "$@"
 }